Filter.



. K PATENTED 11111131, 1905.

o. LFPLBR & lW. WEIDLE.

FILTER.

ArrLloA'rIoN FILED 111111.25, 1904.

UNITED STATES" vPatented January 31, 1905. l

PATENT Orefice.

osWALD LFFLERAND WILHELM WEIDLE, or VIENNA, AUSTRIA- HUNGARY.

FILTER.

SPECIFICATION forming part of Letters Patent-No. 781,536, dated January31, 1905. Application filed January 25, 1904. Serial No. 190,586, y

To cr/ZZ whom, t may concern:

Be it known that we, OswALD LFFLER, of 81 VVahringergrtel, and WILHELMWEIDLE, of Alleeg'asse, Vienna, in the Province of Lower Austria andEmpire of Austria-Hungary, subjects of the Emperor of Austria- Hungary,have invented certain new and useful Improvements in Filters, of whichthe following is a specification.

This invention relates to improvements in filters in which the liquid tobe filtered is sucked through filtering-bodies; and the object of theinvention is to provide a filter of this kind the actionof which will beperfectly uniform and which is so constructed that the cleaning,sterilizing, andrenewing of all its parts can be easily effected.

e The filtering-chamber of the improved filter, is formed by twofplates,disks, or the like of filtering material, between which is arranged awasher, packing-ring, or the like provided with an aperture for a tubeconnected to the Iframes connected to each other in a suitable manner.These frames can, if desired, be so constructed as to form a casing forthe filter, with spaces for the entrance of liquid between itsperforated walls and the outer surface of the filtering-plates.

For pocket use the filter can be provided with a flat cylindricalcasing, circular filtering-disks, `a screw-threaded cover, and apacking-ring placed round a metal ring, by which it is pressed againstthe cylindrical walls of the casing. Both the packing-ring and the metalring are in this case provided with apertures for a small tube leadingto the space between the filtering-disks.

One form of the filter for pocket use is illustrated in the annexeddrawings, in which- Figure l is a front view; Fig; 2, a verticalcross-section on the line 2 2 of Fig. 1, and

Fig. 3 a front view of the filter with the cover and one filter-plateremoved.

The filtering-chamber is in this case formed by the two disks a, offilteringmaterial, and

the packing-ring'Z), of india-rubber or the like,

placed between the said disks. The `disks ct and ring are arranged in aflat cylindrical case o, the cylindrical wall of which is screw-threadedat' OZ for the reception of a screw-threaded cover f. Thescrewingtogether of the cover and case causes the disks a to be pressedfirmly against the ring b. The central parts of the cover and casingsurrounded by the flat borders g are provided with apertures Zt andproject outwardly, so that between them and the sired, in which case thefiltering-chamber. is supported by the cylindrical walls ofI the oas-ving and the borders or ianges g alone. q

Throughthe packing-ring Z the tube j for the filtered liquid extendsinto the interior of the filtering-chamber. This tube is fixed to agrooved metal ring v, which bears against the inner surface of thepacking-ring?) and presses the latter against thecylindrical wall of thecasing, which is provided with a screw-threaded socket or the like Z forthe reception of the screw-threaded nozzle m of thev rubber tube a;Between the socket Z and the flange of the nozzle m a packing-ring o isinserted to render the joint tight.

The lter can, of course, be of other than circular shape, and, ifdesired, a number of filters can be connected to each other in paralleland operated by means of a suctionpump.

The construction of the improved filter allows of taking it to piecesand reassembling it with ease for the purpose of cleaning or exchangingthe parts. The uniform access of liquid to the filter-plates fromoutside and the uniform thickness of the filtering material at all partsrenders the filtration perfectly uniform.

Having now described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

l. A suction-filter comprising in combination two plates of filteringmaterial, a packing arranged between the said plates and forming withthem the filtering-chamber means for pressing the said plates againstthe packing and a tube passing through the said packing and connectedwith a suction-pipe, substantially as described and for the purposespecified.

2. Asuction-ilter comprising in combination two plates of filteringmaterial, a packing arranged between the said plates and forming withthem the filtering-chamber, a tube passing through the said packing andconnected with a suction-pipe, a casing consisting of two partssurrounding the two plates and the packing and connected together bysuitable means, the walls opposite the filtering-plates being so shaped,that spaces are left between them and the said plates, and perforationsin said walls, substantially as described and for the purposesspecified.

3. A suction-filter specially adapted for pocket use, comprising twocircular filteringings in the cover and bottom olt the easing,

substantially as described and for the purpose set forth.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

osWALD Lrrirnna. ll L Il ELM \V l lV l )LE litnessesz GUsTAv PArruNulml,MAX HAUssnN.

